下载了 plastic 后新建项目报错，除此以外没有其他报错。
报错报在unity自己提供的文件，也不敢乱改。这个应该怎么解决？
错误信息：
NullReferenceException: Object reference not set to an instance of an object
调用：
Codice.Client.BaseCommands.BaseCommandsImpl.GetWorkspaceFromPath (System.String path, System.Boolean doPlatformGetPath) (at <4d34e3df724146edacbda57a9d62370d>:0)
Codice.Client.BaseCommands.BaseCommandsImpl.GetWorkspaceFromPath (System.String path) (at <4d34e3df724146edacbda57a9d62370d>:0)
PlasticGui.PlasticAPI.GetWorkspaceFromPath (System.String wkPath) (at <4d34e3df724146edacbda57a9d62370d>:0)
Unity.PlasticSCM.Editor.FindWorkspace.InfoForApplicationPath (System.String path, PlasticGui.IPlasticAPI plasticApi) (at Library/PackageCache/com.unity.collab-proxy@1.9.0/Editor/PlasticSCM/FindWorkspace.cs:32)
Unity.PlasticSCM.Editor.AssetMenu.AssetMenuItems.Enable () (at Library/PackageCache/com.unity.collab-proxy@1.9.0/Editor/PlasticSCM/AssetMenu/AssetMenuItems.cs:40)
Unity.PlasticSCM.Editor.AssetMenu.AssetMenuItems.BackgroundWorker_CompletedWork (System.Object sender, System.ComponentModel.RunWorkerCompletedEventArgs e) (at Library/PackageCache/com.unity.collab-proxy@1.9.0/Editor/PlasticSCM/AssetMenu/AssetMenuItems.cs:32)
System.ComponentModel.BackgroundWorker.OnRunWorkerCompleted (System.ComponentModel.RunWorkerCompletedEventArgs e) (at <0463b2ef957545c0a51b42f372cd4fbb>:0)
System.ComponentModel.BackgroundWorker.AsyncOperationCompleted (System.Object arg) (at <0463b2ef957545c0a51b42f372cd4fbb>:0)
UnityEngine.UnitySynchronizationContext+WorkRequest.Invoke () (at <88f69663e9a64d00b2091d1
d8dfd4d38f>:0)
UnityEngine.UnitySynchronizationContext:ExecuteTasks()